Flash experimentation

I came across a street artist/band/rap group called 'Motion Enterprise' The group was in a underpass playing loud music and cooking food on a barbecue in the corner. I spoke to the group and they had no problem with photographs of their work or of themselves. They sprayed a new 'tag' on the wall and the paint was still wet so felt like i had to photograph it. The underpass had quite low light so i had to use flash, I used the diffuser cards so the light would not be too harsh and bounced the flash off of the ceiling. I think I am going to make good use of the flash and especially bounce flash as lighting something from above is a good way to evenly spread the light on to any surface or subject. I also like how using the flash brings out every detail in the surface and really makes the colours pop.